Dear, In week 3, we have learnt about Relational Algebra such as selection, projection, etc. Do we have to remember how to write the relations using those symbols/operations (U, up-side-down U, big Pi, sigma, etc..) or we just need to focus on SQL queries? For example, do we have to know how to write these: - R U S - Pcol1, . . . , coln(R) - rR(myCount) ÁCOUNT propertyNo (σrent > 350 (PropertyForRent)) ... *(I just copy from the slides, you can check the attachments to be clearer) Regards,

Hi, Please focus on the SQLite queries, but remember the logic behind the relational algebra operations.

Cool, I know the logic & may decide whether a given relation is the correct or not but I may not write down those things by myself because they are so hard to remember their names or symbols or drawings, etc. Thank you.

For example, if you meet this question, you should know how to calculate the answer.

Sure, I can translate and compute it. Is that kind of example in the exam ?

May be :)